January 2012 8.1 PLC Functions 1495
8.1.9 The TRACE function
The TRACE function enables you to:
Check the logical states of markers, inputs, outputs, timers, and counters
Check the content of bytes, words and double words
From the PLC main menu, press the TRACE soft key to select the TRACE
function. The control displays:
The statement list (STL) of the selected PLC program
For every program line, the content of the operand and the accumulator in
HEX or decimal code (selectable by soft key)
The control identifies every cyclically executed command with an asterisk (*).
Use the arrow keys or the GOTO function to select the program section that
the control should display on the screen. In addition, you can use the
NAVIGATE soft key to call additional soft keys for navigating in the source text
and a search function.
The PLC program to be displayed is selected with the SELECT MODULE soft key,
and must be the currently active main program or a file integrated with USES.
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